Question about JVC RX-778V

1 Answer

No Prologic Surround Sound

I own a JVC RX-778V home theater audio/video control receiver.

The unit has worked perfectly for years.

Last night, I popped in a DVD and got -- ugh, no sound.

Debugging activities took most of the afternoon today -- replaced
digital audio cable, confirmed DVD player works on analog connected
directly to the TV, etc.

Current symptoms:

o get sound out of only one speaker now in ALL modes.
o no sound whatsoever when Dolby / Prologic / Surround Sounds is on.
o get DVD audio over analog outputs only (out of one speaker only).

I'm 99% certain that menu configurations are correct.

Has anyone ever encountered such a failure?

What's more likely, digital audio out from DVD player is shot, or
surround sound in receiver is shot?

Not sure how to proceed. Again, I've read the manual word for word,
experimented with zillions of configs.

Any advice greatly appreciated.


Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Im thinking the reciever is set to get its audio from somehwere other than the dvd, sounds like you did most of the troubleshooting but do you get audio out of the reciever if its just playing the radio or something other than a dvd?

Posted on Feb 13, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Jvc rx 778v remote working but unit does not respond

your remote may be assigned to another unit on the remote. Press receiver on the remote.

Mar 12, 2014 | Audio Players & Recorders

1 Answer

I would like to use my jvc home theater while watching tv. But i have no idea how or what wires to use to make this work.

You will need a 2RCA to 2RCA audio cable as shown below. Connect the audio out socket of your TV to the Aux or TV/SAT input of the JVC. When you want to hear the TV sound through the JVC system just select the appropriate input on the JVC. If you want the surround speakers to work, select ProLogic or All channel stereo on the JVC's surround settings.Because by default the radio or TV sound is only stereo, so only the front left and right speakers will work. PLII will convert 2 channel to 5.1.

Apr 26, 2011 | Audio Players & Recorders

1 Answer

Subwoofer not working.... JVC surround sound system 778V Subwoofer Part Number SP-PW37-SUB I hear a hum coming from unit so there's power going to it. I hear weak bass thumps with volume turned all the way...

A connectivity check could provide the solution, notice any wrong wire connections on device or any other devices requiring interconnection. The woofer would perform properly when the connections that provide current for woofing are approapiate

important notes
1. Trace the connection from Recorder or sound output to the woofer device
2. The wiring connections should be sound and video ouput into sound and video output into woofer.
3. The connections if any problems would be located at the stereo recorder or device producing the spund and video. Check the connections of wires on the recorder device ensuring rewiriing
4. finally, adjust the equalisers if any the buttoms could have been disbled by master switch hindering full blaster boost sound.

Dec 05, 2010 | JVC RX-778V

1 Answer

How to get surround sound?

Hi, I would recommend using an optical cable from your Sky box to your surround system. The should look like this:

Feb 16, 2010 | Yamaha Rx-v365 A/V Home Theater Receiver

1 Answer

Can I still use my prologic receiver for my LCD TV ?

optical connection in tv is only input optical connection in receiver is only input will not work.need to connect rca jacks to tv's audio out jacks behind tv to any available input in receiver

Jan 04, 2009 | Samsung HTP-1200 System

1 Answer

How much is a JVC RX 750v worth?

I have this same unit. It is many years old, and does not handle any modern codecs, nor home theater duties. It was, however, a very good unit for its day. If I were to sell mine, I would not accept less than 100 US with remote.

Nov 11, 2008 | JVC RX-664V Receiver

2 Answers

Center Channel Audio

There are probably several sound settings on the receiver :
Dolby surround , stereo, theater, SACD etc.
Try another setting other than the one you have

Dec 16, 2007 | Yamaha RX-V661 Receiver

Not finding what you are looking for?
JVC RX-778V Logo

315 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Audio Players & Recorders Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

The Knight
The Knight

Level 3 Expert

75017 Answers


Level 3 Expert

5318 Answers

Are you a JVC Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides